Revised Edition: I Don't Understand Difficult Things, But Please Teach Me How to Increase My Money! Gen Yamazaki / Kosuke Ohashi Price: ¥1580 #GenYamazaki #KosukeOhashi #Books #Society/Economics/Finance There is a small stain on the third photo, which is difficult to see. I have read it once. Please purchase only if you understand that it is a used book.